Default Help with unlocking galaxy s4

So my girlfriend locked her phone up & now cant remember pin.. I need to get this unlocked without a factory reset because there is critical info on it tht was not able to be backed up yet.... im not extremely tech savy but not against trashing phone to recover info either.. maybe posible to claim on insurance.. idk.. I just need info asap... any & all help is desperately appreciated! I shud b able to answer any & all questions... thank you!

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